Combustion of 6.90g of this compound produced 13.8g of co2 and 5.64g of h2o. what is the empirical formula of the unknown compound?

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a .

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size